Foreign Intelligence Surveillance Act

It runs by its own rules and its proceedings are kept secret, but we know the fundamentals of how the court was conceived and how it functions.

The bill is pending Trump's expected approval.

The House voted Thursday to renew a surveillance program without adding protections for Americans whose data is inadvertently collected without a warrant.

Surveillance in the name of intelligence gathering is nothing new. Here's a look back at significant developments over the past 30-plus years.